Zatar - IoT Analytics
Grafana - Data visualization & Monitoring with support for Graphite, InfluxDB, Prometheus, Elasticsearch and many more databases
Azure Stream Analytics - Azure Stream Analytics offers real-time stream processing in the cloud.
Datadog - See metrics from all of your apps, tools & services in one place with Datadog's cloud monitoring as a service solution. Try it for free.
Oracle Internet of Things Cloud - Securely connect, integrate, analyze, build, and deploy innovative IoT solutions to gain business process efficiencies and data-driven insights with Oracle Internet of Things (IoT) technology.
Prometheus - An open-source systems monitoring and alerting toolkit.